As for financing, just to be clear, a line of credit and a 203k loan are two very different things. 

[3] Will buying the 1st loan trigger a foreclosure by a 2nd note holder, meaning will I need to pay off both 1st and 2nd to assume ownership; would this differ by state such as Texas or California or Florida (???)

I've thought of 3 different approaches - 1. co-borrow...multiple parties on deed, entitled to % rent & depreciation based on investment, have "access" to property2. co-sign...multiple parties not on deed, negotiate % rent & depreciation based on investment, no legal access to property3. side-deal...parties gifts the down payment, operator must qualify for loan, all other details TBDAre there more approaches/options?

The amount of rent is based on the AMI which can be found here in this handy chart:https://www.sandiegocounty.gov/sdhcd/rental-assistance/income-limits-ami/so the calculation looks like this:For a 1BR unit (2 person household) at the very low income level you could charge a max of 1/12 of 30% of $48,500 or $1,212.5 per month.Also, in the agreement that I've seen (which was for a different City in CA) there were some restrictions against students.  

Gap funding can help cover the difference between your available funds and the down payment required by traditional lenders, but it often involves higher interest rates and adds complexity to the process.Finding off-market deals can be challenging, especially for beginners, and higher interest rates may mean lower rental income.

You might utilize these extra cash for a down payment on a different house.Another good alternative is seller financing, which may be arranged directly with the seller and may entail a down payment and interest-bearing payments of the remaining amount over time.

They have different programs available that you might find interesting  

If there was any, you did not have many properties to work with.At the end of the 3 day workshop when they pitched the different tiers of mentorship programs, I remember an older gentleman who could be my grand pa decide not to purchase any program because after hearing all their spill he could not see or observe, I quote "Phill Grove have skin in the game" for the mentorship program.

Hey @Jonathan Leung - happy to have a barter convo with you about this as I'm currently interviewing different marketing agencies for my own advertising strategies. 

The studies being released show how different industries appear to be increasing their profits with hidden or bogus fees that can harm consumers and companies that have honest business practices.