19's aren't something that is going to get you any actual dive time and it means you'll be adjusting cam bands if you go back and forth. I was assuming they were for pony bottles not for actual diving bottles. At 5'0" you should be able to dive with a c63 with no problems and that will mean you don't have to adjust the tank cam bands if you're going back to 80's.
Steel tanks would be ideal as they have a larger capacity for the same size, and allow for a lower total rig weight due to the buoyancy characteristics.
re. the compressor. Yes, you need to determine space first and what you can fit in there. The compressors need access to open air away from any sort of vehicle exhaust to breathe properly so they are usually in rooms closest to exterior walls, and they need adequate air flow to keep them cool. For depths like that I would highly recommend nitrox blending for deco safety.
Banks you want banks that match the output of your compressor for efficiency. I.e. if the compressors are putting out 350bar, you want bank bottles that are at least 350bar or higher. I'm not sure what bottles are available in your area, but the welding/fire departments usually have access to high pressure storage/cascade bottles, and I would recommend at least 4 of them. Common ones in the US are 4500psi/444cf, 5000psi/474cf, and 6000psi/509cf. Get the highest pressure bottles you can afford, but I would recommend no less than 4 of them, and more preferably 6 set up in 2x,2x,1x,1x for the banks, or more. Cascade setups aren't complicated if the bottles all have the same working pressure because to fill them all, you just open all of the banks and let them fill together. If you have different working pressures *many shops use 2400psi O2 bottles for storage*, then you have to be watching the fill block the whole time to make sure to shut off the low pressure banks before they get seriously overfilled. Cascade setups will allow you to fill the most tanks to the highest pressure in the shortest amount of time by cascade filling, and frankly if you have enough of a storage volume, it allows you to use smaller compressors.
Unfortunately in terms of specific equipment, I can't help that much without knowing which brands are available.
For Bauer specifically, and if money is not an object
Compressor: Vertecon VTC20-E3. 20cfm compressor at 5000psi, you don't need higher than that. Depending on price I'd either get two of them, or two of the VTC08's. This all depends on how long you want to wait for it to recharge the bank bottles, and if you can afford to be without a compressor for a few days if something breaks or you need to do maintenance.
Auto Cascade-this is an automatic 4 stage cascade system which takes some of the mystery out of cascade filling and is a nice toy. Same can be done with a manual manifold block that is cheap to set up, but if money is no object I'd go for the fancy toys
Securus air purification system. Never hurts to have more filtration, especially when diving deep
Air Storage-Bauer sells bank bottles, and I'd just get the 5000psi bottles here since you don't need the 6000psi bottles since the compressor doesn't go that high. Buy whichever are cheaper between UN or ASME. I think the UN's are usually cheaper. They also have rack systems and can set up the cascades for you.
CF525.5-3 fill station, can be either the M or the S, but is a 3 bottle fill station that is basically explosion proof if something goes wrong during filling. Verify that this will fit an AL80, and you'd obviously have to order with scuba fill adapters instead of scba adapters
This setup would be horrifically expensive, but it depends on how big your budget is. Point is that Bauer can get you set up with everything you need to fill tanks except for the nitrox blending station which will depend on whether or not you want to use nitrox, and how you want to fill it.
Tri-Hunter 6000 Trimix/Nitrox Mixing Stick | TriHunter6000
This is the best system on the market that I am aware of, but you have to commit to having certain banks or all banks being the same nitrox mix if you're going to do that, otherwise keep everything O2 clean and PP fill
