Expect rates in the upper single digits with a few points and interest only payments during the loan term of 12-18 months).    

I don't want to call around because I don't want to get raked over the coals and I also want to learn how it's done.And where can I get this "Revenue Number" that's supposed to be like a 10-digit EIN or something?

You can probably hit double digits here if you just stay patient for the right deal. 

Buying everything I can, and providing clients with double digit  net caps.

It has its limitations, in that their Housing Price Index is based on the movement of single-family properties with mortgages purchased by Fannie & Freddie Mac, but it does go back to 1975 (where available), by Zip Codes (scroll down on the above link till you see "Five-Digit ZIP Codes" and download the Excel file.

You can always convert to a more digital process, but I find paper is easiest since 95% of the time you already have a receipt.

As for the prices, if they don't like it, I walk away, on the bright side, if this puts more appointments on my calendar because they think I am cheap, then great, the downside is, private individuals will be afraid to do a transaction with me because they would think that I am "hard up for cash", then they are wrong --I have a 6 digit line of credit from private individual that I would not like to put on any application just because its not verifiable-- and I could care less, government entities or development projects doesn't care anyways.For private projects, I do not need the income on a weekly basis to pay my own bills (unlike the handymen and most small GCs where personal drama gets involved in your project), if they could cover payroll and materials weekly, then that's all I need, I will take the profit at the end and only after satisfying the contract.

Do renderings (digital, so I can do it very fast) of properties showing what they would look like with a different color scheme, or a bungalow as a Cape, or a ranch with a 2nd floor, etc....  

I use Allstate and don't have any specific issues like that, and I have a PUP that extends my protection pretty significantly (7 digits). 

It's a bit risky in the beginning (CoC return of ~0.30%) but it provides the opportunity for a double digit cash-on-cash return after the first year if I raise the rent (10.78% w/ Unit 2 as a 1 bedroom, 14.76% w/ Unit 2 as a 2 bedroom).