I am considering buying a forclosed A frame house (22'x48' base and the roof has about a 3/2 rise/run slope) that has a very unique fiberglass roof (see pictures) in the South-west part of Virginia.

This time they sent out a different company who told me that there was a crack in the fiberglass bath tub, and because it was already fixed once this would not be covered under the warranty.  

I've been using acrylic or fiberglass sheeting.

That said, true money is made in c-store.Before prchasing a gas station it is most importance to determine full enviromental phase 1 and phase 2 report as well ensuring if there fiberglass tank are upgraded.You need clean phase 1 and phase 2 report.

To the OP, short of one of those ^, I'd suggest a pickup with a lockable fiberglass tonneau cover.

At some point in the next few 1-3 need roof will need full replacement ( flat roof with alligatoring all over it, patches all over the place and you can start to see the Fiberglass membrane, underneath) Not Good!

I discovered my newest rental has a crack in the fiberglass (plastic?)

Believe me, you will find you have MANY more friends when the work is done, and the pool is clear and cool with some frosty drinks at hand.If I were to do it over, I would only go with a one-piece fiberglass unit. then all you have to worry about is the water table rising and your pool pops out of the ground (although that happens to concrete pools too).In spite of all that, if you love poolside life, and like to entertain, it makes for a great summer.

At 7inch with rebar, mesh, fiberglass threads or nothing?  

I have 12 fiberglass walk in shower units.