Your PM fees for LTR will be more in the 10-12% range, while for STR it is more in the 25-30% range (and don't forget about GET/TAT). 

The best deals will all have a handful of financial ratios/percentages in a certain range.

Things like a new roof can range - here in Philadelphia where i do a lot of work, our flat rubber rowhome roofs are fairly inexpensive and standard . . .

From what we can find, houses with piers in the neighborhood have largely had to go very deep (90-120 ft), so estimates from local foundation contractors are ranging from 70-130k.  

For this reason, I would take inventory of the local banks within your target markets that offer financing options that best serve your real estate needs (again, usually the smaller local banks), and build depository relationships with them.

The voucher holder is happy (very limited inventory) and as the landlord I can get a higher rent compared to the private market.

Sellers often favor buyers who can make larger down payments, as it indicates stronger financial backing and reduces the risk of the deal falling through due to financing issues.Additionally, SFH properties are more accessible to a wider range of buyers, including first-time homebuyers and families, which can lead to less direct competition from institutional investors.

what you're proposing, while possible, is incredibly difficult and highly risky, and i don't know how you would do it completely remotely with no plans to visit or set up a team.i think i've said this in other posts, but there is tremendous demand for inventory right now among both retail buyers and investors. 

I thought this could be a good way to take inventory of other situations landlords experienced and make proactive updates to our leases without having to first experience the same fact pattern.

-Detailed inventory and inspection of owners property (this is done for LTR also, but few LTRs are fully furnished and outfitted).