Since then the new tenant in that unit has complained several times about pests, and the property manager has ordered 3 treatments in 5 months.

Long term tax implications especially if you live in a market were history has shown significant value increases.. and the reason I say that is the homeowner tax exclusion of 250 single and 500k married is one of the best tax treatments in the US>. so folks that live in high appreciating areas this is quite significant. 4. then lastly whats your tolerance for someone else telling you how to live in the home and such..

Also is a cistern cheaper then a new well or treatment system?

My cancer treatment was 250k and that was almost 10 years ago.

It's not worth the hassle to defend yourself if they question an invoice from you, where they may not from a contractor.Also, you may instead want to look at enzyme based concrete treatments over paint.

We source our water directly from the county and flow our sewer to the municipality, we have no well/lift station/treatment plant or any chemicals.

Most of these are fractionalized as Delaware Statutory Trusts (DSTs) which also qualify as actual ownership of real estate although you actually own a membership interest in the trust itself.Key to the DST, TIC and NNN properties is that they qualify for 1031 exchange treatment. 

My only issues are that I'm in Chemo treatments at the moment (I have people to do the work), on leave from work due to COVID-19 (I work in the school system), and have no savings to buy my ex out and complete the needed repairs. 

I think they paid about 70k a door then.. so as we come up to 150k a door for smallish type condo's might make sense.. although tax treatment gets hammered.. 

Got an expensive termite & crawl space repair needing to be done before closing required by the underwirter, totaling about 8K, including termite treatment, organic growth treatment, digging out dirt for enough crawlspace height clearance, stiff legs insulation, vapor barrier, 6 crawl space vents (2 powered & 4 regular), and 5 vent wells.