Your questions are many.
I would never recommend solo diving to anyone...it is something you totally have to decide on your own.
In regards to the practical side of being properly geared....I use a slung pony bottle regardless of diving with a buddy or by myself.
As far as tracking transmitters go....hmmmm never dove with anyone using one.
A proper SMB and/or appropriate lift bag is a must.
I would never recommend solo diving to anyone...it is something you totally have to decide on your own.
In regards to the practical side of being properly geared....I use a slung pony bottle regardless of diving with a buddy or by myself.
As far as tracking transmitters go....hmmmm never dove with anyone using one.
A proper SMB and/or appropriate lift bag is a must.