Those two together create equity.Here's what I want you to understand about “buy and hold” residential real estate:Let’s use a single family home with a property value of $300,000Let’s use an initial loan amount of $240,000Let’s use an interest rate of 7.25%And I’m going to give you $150 of cash flow per monthUse a 5% appreciation amount for your property per yearLet’s see what happens after 5 years:After 5 years…$150 of cash flow per month = $9,000Your mortgage has been paid down to $227,000 = $13,000Your property is now worth $382,000 = $82,000So that’s $9,000 of cash flow, $13,000 of principle buy down, and $82,000 of appreciation.

Even under this scenario, with a 50/50 split, you will not be getting paid for doing all the work.Another option would be for you to put in 50% of the purchase price using an LLC that you own 100%, borrow the remaining 50% from your investor as a 2nd position loan at a fair interest rate with points, and borrow the rehab under your personal guarantee.Better, if you can find a lender who will lend to a newbie, and they are out there, you could borrow the purchase money using some of your cash as a down payment, as well as all the rehab funds using a construction loan.

If the seller will entertain it you write it into your offer - what you're willing to pay total, loan term, interest rate, down payment. 

(Floating rate loans, with no rate cap) 

My mentor says you can get more cash flow and liquidity with SFH vs Multifamily, since brokers seem to want a certain cap rate on sales accross a geographic area vs when working with SFH sellers, they're more flexible and motivated based on individual needs.What are your thoughts on buying SFH vs Multifamily?

Wanting to explore other options or find out other financial strategies for trying to build a detached home on our lot without having to refinance out of our 2.75 interest rate with a cash out or doing a HELOC.

Last I did their rates were 1-2%. 

I normally purchase very cheap homes, remodel, refinance and rent.

and unfortunately, with rates and prices high, it has just gotten very, very tough to cash flow on long term rentals.i browsed a few other threads you started and it sounds like you already own your primary residence and are looking to get started in investing. 

You’ll get an automatic 20-40% discount (tax deduction) off the rates which might make doing it yourself not worthwhile.