What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

Either would be a great option; I'd probably choose Roseville because it's more established, but the City of Elk Grove deserves a lot of credit for its impactful growth programs, so it wouldn't be a bad option. 

I just provide DTV and internet.

Any prospective resident with bad credit or a prior eviction is going to have an impossible time finding a place to live.  

Credit for childcare expenses.The credit is allowed for kids 12 and under.

See if any of them will allow you to use their address as a virtual location on the Internet.

Knowing cap-x projected out years is not an "extra credit" kind of information, it's fundamental necessity. 

@Angelo LlamasAt the bare minimum, you should do the following to make your bookkeeping easier:- Dedicate one checking account and credit card exclusively to real estate.

Real estate investors are sitting on an untapped goldmine of financial leverage through EIN Corporate Credit, a strategic tool many overlook.

Whether we agree with these items or not, the following are inflationary government policies: stimulus, student debt relief, tariffs, increased child tax credits, limited immigration, and big government deficit spending.