A co-host will be expected to know this and how to achieve it and execute on it in order to be successful.Also, keep in mind some states are very strict about what it means to be a co-host.  

I am strictly looking for a Portfolio or Community lender.

I have quite some questions that need your help: For tenant screening, I plan to do the routine background (eviction, criminal) screening and credit check.

(need to be strict with time)....Anyway, I want to make sure I of all the knowledge I need to make as few mistakes if none, possible ...My first questions after all appovals and permits.  

Can you advise how strictly these rules are enforced?

Before beginning the process you should speak with an attorney to ensure your strictly adhering to the law.Identily a property that you would purchase and your target acquisition price and work out the ARV to show the potential profit spread. 

If you're going the umbrella insurance route, perhaps see if it will cover you for several things including just the routine slip and fall (like mold or earthquake).

Typically even if you run into reasonable unforeseen expenses,  those added costs can be absorbed by a rental asset over time whereas the same can't be said about a strictly for-sale area.

The lease was re-crafted when I purchased to add an appendix that strictly prohibits trampolines, pools, swing sets, and more. 

If you're willing to make it strictly an investment property, then you could refinance with a DSCR cash out.