Should be no more than 28%.Second ratio - Total monthly debts. living expenses plus monthly debts like student loans, credit card payments, car payments, alimony, etc.

I have excellent credit, make about 75k/year with no OT, no other debt than my truck payment, and I have about 50k to put down.  

My credit is good/very good and I will have 50k to fund my first deal. 

You’ll get the  judgement and while you may  never see a penny, trying to find a place with a judgement or getting credit just got a lot harder and more expensive for them. 

I have my property listed on websites and have received applications (with background/credit checks), along with many requests to view the property.

Credit score below 500. 

Borrowing against it is hard due to credit challenges.

You can not invest wisely without cash and cash reserves.Almost forgot....make sure your credit score is high, 750 or better.You need cash for a DP, closing costs and a reserve fund after you buy.

Probably due to bad credit but possibly a (maybe overextended) investor.2.

@Mitchell LitamThat's concealed grid product that was glued to drywall for sound control.