The heat exchanger is fabricated from natural gas pipe. 

Yes, both Boxwell & Janus will sell and/or erect pre-fabricated Self Storage units. 

Can Landscape fabric be used.

What @James Wise said.Plus, 60 amps, that might be old 110V service and those old fabric covered wires.The flickering and surging might be the OLDEN DAYS fabric wires arcing inside the walls (a fire on it's way to starting).Even if the outlets have 3 prong holes and you see some ROMEX, it doesn't mean they redid the whole system with ROMEX, there will be hidden from view junction boxes that might still have old wire in them, or old plastered over live wires.Fix it quick--flickering and surging is not a good thing--it's very dangerous.You may be forced by law to bring it up to current code, GFCI Breakers, etc... ($$$$)And make sure the smoke detectors are up (not expired) and working properly.I shudder to think how you will feel if someone burns to death in there.

I bought 10 of them in assorted colors, and bought some fabric transfer printer paper to make my own uniform with the clinic logo. 

A good countertop fabricator may be able to cut out a slice and find a similar piece....I doubt it but maybe......This may cost you $1000.....

This appears to have been done when the ducts were fabricated! 

If vacant you need to:what is cost of dumpsters vs buying a pick up or finding some hauler to throw away all the demolition  secure and board up and add cameras, get roof bids, order roof parts, roof needs to get on the house ASAPclean out dry wall, everything fabric throw away, cut up and remove carpet, mop the studs and floor with bleach and water solution (5% bleach), inspect electrical - maybe some shorts or problems, order flooring for kitchen and baths and new kitchen cabinets (measure like you are OCD ten times), how is the sub flooring?

If one of our customers wanted to add those to an existing job, we could probably fabricate and install it for around $2k to $4k depending on hardware selection.

Most likely her whole backstory is a fabricated web of lies, but even if it isn't I wouldn't take her due to her response to fairly simple clarifications of her application.When you made this post, you already knew there was something amiss, right?