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

If I have to renovate a bathroom, I no longer use the plastic/fiberglass shower inserts.

--I could make a laundry list of surprises, but the biggest of which included: New Septic tank required ($5500 job) Entire new plumbing required (100% new plumbing for about $3400), electrical panel needed to be replaced & grounded ($2800 job), gas line for furnace needed replacing (roughly $800), flooring beneath bathroom needed replacing (we swapped a built in shower/tub for a fiberglass insert to save $)Lesson Learned: If something doesn't look right, it probably isn't.

Plumbing fixtures are Moen / Delta and fiberglass tub / shower base and surrounds.

I don’t know what to say about the insulation, except that there is fiberglass insulation in the walls.  

It is fiberglass reinforced, can be found at lowes or ordered at Lowe’s, and it will help slightly structurally also.

The results can be seen in the pictures below and final numbers at the end.Sheetrock work and then painting in the den and refinished the pine floors under the nasty pink carpet.Tore out siding on the porch and added sheetrock, installed new fan and light fixture, painted, closed in a window that looked from a bedroom onto the enclosed porch...Managed to save the cabinets, added granite and stainless appliances.Refinished the tub, kept the original floor and redid the subway tile in the original bathroom.Added this closet in the master, refinished the floors after ripping out purple carpet in here, painted walls, sanded and painted woodwork and added the fan.A laundry room no more, added this great bathroom onto the master bedroom.  5ft double vanity with granite top, toilet, free standing tub and custom shower.After having 5 tile contractors no show, either for the bid or after I had given them the job, I used a stock fiberglass shower pan from Lowe's and tiled the walls around it to avoid any more delays. 

After two inspections on the swimming pool, we were informed that the fiberglass coating has failed.

She then asked if the shower was fiberglass or tile and decided I'd never rent to her.

Lowes sells the Pella brand -- I feel they're not as well made.I pay about $170 per replacement window and I can remove an old double-hung window, remove the weights, insulate the weight cavity with rock wool or fiberglass insulation, and put in the window in about 2 hours each.