Can anyone recommend any good note buying marketplace forums for buying/selling. 

Just my two cents.As everyone else has stated here, always go through the normal due diligence you would when buying any property regardless of who the seller is. 

Our strategy is to buy land cash, take construction loan to build the structures.Some napkin math for this strategy:Land cost : $200,000Building and furnishing Cost: $400,000 for each A-frame (Provided we have electricity, well ready )Airdna revenue estimate shows $400 night rate with 70% occupancy.

For the NOO "motivated buyers," some of them buying other people's properties in this market, will end up like the 2006-7 "FOMO investment" buyers who lost their property at the courthouse steps in 2010-12. 

Investment Info:Single-family residence buy & hold investment in Temecula.

I would then plan to use this forced equity (since I plan to buy a fixer upper) to invest in another home.I have been constantly reading to househack right into the MFH, but this may take some time for me to acquire the money and purchasing power.

👋I'm a dedicated buy-and-hold investor looking to expand my portfolio, and I'm eager to connect with lenders who are ready to dive into more deals with me.

We are considering renting a home in the neighborhood we are interested in buying in, to test it out for a few years.

Many people buy in larger cities like this because the paper cash flow looks sweet, but the reality of it, across the board right now - good cash flow equals lower neighborhood class, more variable tenancies, and tons of hidden capital expenditures.

It looks like you are not able to get lending because your Debt-to-Income ratio is too high.You should figure out what your DTI ratio is.If you are buying cash-flowing rentals, your rentals should actually be helping you get future loans easier.