The quality of work on prefab is not great, but easily sufficient for rentals.  

With that being said, there are creative ways to scale SFH or MF home rental still sufficiently. happy to connect and strategize if you have any DSCR or investment-specific Q's.

We think it’s important as it allows us to check for Non-Sufficient Funds (NSF) issues and to determine if an applicant is living paycheck-to-paycheck.

Our application requirements with fee information are here.I don't know anything about Zillow's application, but I would think it may be sufficient.2.

Lenders might consider this if the other members have sufficient credit and income, but this is up to the lender’s discretion.3.

Quote from @Eric Prescott: Yes, I understand that appreciation often means less cash flow and good cash flow typically means weaker appreciation, but there is a sweet spot where there is decent appreciation and sufficient cash flow to cover expenses so that the property pays for itself, and that is what I'm honing in on. 

So if you ave sufficient income to hold the properties and goal is long term wealth building, you are likely to be good.

Directly investing in real property investments, whether property, notes, tax liens, or leases requires a THOROUGH understanding of all LEGAL aspects concerning real estate law in general and the investment in particular.It’s IMPOSSIBLE for someone who hasn’t accumulated either a legal education in real estate law or 20 years active experience to have the knowledge and understanding of legal aspects sufficient to reduce legal risk to an acceptable level when investing directly in tax liens, notes or real property.  

I was just wondering if that was sufficient.

If your properties are grouped in different LLCs then one checking and savings for each LLC should be sufficient.