You'll be left with lower quality tenants which wont take good care of the property and cost you more money in the long run. 

And, if the money is borrowed and you lie on your loan application about that (they will explicitly ask and you will have to explicitly lie if you want the loan) then you're committing loan fraud.If you have to turn right around and sell this property for some reason, I,as the lender of the 20% down, will suffer a 50% loss. 

It does put the buyers agent in some awkward positions though when they make an offer and then we counter removing or drastically reducing the commish.. the Buyers cant understand why their agent wont work for 5 to 10k.. compared to 15 to 20k on the what used to be normal 3% buyers side..

What made money in 2010 wont' work in 2019. 

I’m in a city that really suffers from developers wiping out all the culture and and building expensive housing.

According to the current tenant, there are repairs here and there that need to be made but the owner just wont do it.

Again I'll do more research on how much this could cost but I imagine it wont be cheap.

Hell most people investing in tax sales wont have a need to invest in more than 4 or 5 counties in a particular state for that matter.

When the economy suffers as a result of too much of a contraction, debt payments are harder to make, etc, then go through the cycle of loosening it again, devaluing the currency so debt payments are easier to make, and banks can profit higher than before.

Rents have not quite kept pace with the median price increase and as a result, cash flow has suffered.