The most efficient method  is to create one contract and then add/subtract properties that are either acquired or sold by this particular client through a contract addendum. 

I personally don't agree with the cost per square foot method, way to vague and inaccurate.

I like to purchase turnkey and use the house hack method.

Rabbu has my market at about 50% of what it should be for instance.But I think between using all the tools, talking to STR friendly realtors, the enemy method, etc.....one can get fairly close

Which method(s) have you found beneficial or that you are keen on? 

I know there are investment platforms where sponsors can connect with investors, often at a premium, but I’m curious about other proven methods that don’t involve purchasing a list of accredited investors.For those of you who have successfully raised capital, what approaches have worked best for you?

I have actually managed to save up enough for multiple down payments around 20% as i have been here for 5+ years and not been able to qualify for credit (due to history length) so i have been pursuing the 20% conventional method initially. 

Miss by a day and you are paying a hefty tax bill (income taxes plus early withdraw penalty if you are younger than 59.5 years old).

What methods of fianncing have you been usuing to grow your portfolio?

For notices, contact her through her normal method, but also post a notice on the house AND send a registered letter to the last known address.