What's the best way to save and organize digital receipts and to snapshot paper receipts? 

I should note that that I was using Baselane's banking service to collect deposit and rent, and had moved the funds immediately to my private bank after I collected (thank god!).

just to save on my own mortgage How did you find this deal and how did you negotiate it?

I know I can reach out to some mortgage brokers to connect me with a private lender for most of the mortgage and then I would just need another lender to supply the down payment and renovation money.

Look for private sales in public records or on FSBO sale sites, and/or6.

Quote from @Dylan Jeluso: This questions is the same question as getting your real estate license when doing flips, you have access to the MLS, you save money on the commission, and you have a little bit of a competitive advantage over the next person that is not licensed.

If each property costs $250,000 and the only acquisition cost is a 25% down payment, how much savings would you need?

If it's private money, they would issue a letter.

They also provide guidance on entity selection, tax strategies, and long-term planning, which can save you money and trouble in the long run.

Save your money, do some Google'ing and you'll be just fine.