@Dennis Boettjer - everyone's comments above are correct. 

I can comment on cash deals.

I really like this and I will follow it.One last comment, if I want to focus on finding deals, what are the most efficient/productive ways to find them?

I rushed over and when I got there I found about 20 couples, all obvious newbies....the comments I overheard were - "I don't like the color of the walls in the entry"...."

At some point the House wins.To put it in Self storage terms, very similar to my C market comment above.

TIAErich  Erich - I would echo other's comments, but also point you in the direction of a Bigger Pocket book, "Estimating Rehab Costs" - It's a 2019 version, so the actual dollar amounts will need to be increased, but it can give you a good starting point for the process that you can refine/update over time. 

Lots of great comments.

Hi Sarah,Regarding your comment to local property managers.

Quote from @Hector Espinosa: Hi All,I would like to hear your comments about the following property, which I think, based on the analysis I made, seems to a be a potential good investment:* Purchase Price: $98,000* Monthly Cash Flow: $310* Annual Cash Flow: $3731* CoC ROI: 15.86%* 5-year annualized return: 15.35% (with a profit if sold of $25K)Also, what are some of the disadvantages of buying old houses? 

Some of the comments above are simply ignorant to what lenders allow and don't.  501c3 falls in the same area as non-recourse loans for the most part.