However, its subscription costs can add up, and the effectiveness of direct mail depends on execution and market conditions.

Just depends how you go about the process and what loans you use.

Many basement access doors are not 36" wide depending on the age of the property.

It 100% depends on your contract.

Whether you fix it up or sell it as is depends on what your market dictates.

We are thinking of adding more in the future depending on the relocation plans.Buying a new property in Seattle will mean a new mortgage for 30 years and very likely incur a high DTI with high monthly payments.

I guess it's all dependent on how much equity you can provide to a house during the rehab portion of the BRRRR method. 

Going to depend much more on more details / your personal situation - all things equal you will probably get better rate/terms on conventional if you qualify for both

You could tell them to cancel the listing and you will find someone else to list it after a month not 4 months (the market take is subjective too, all dependent on what your house has compared to others, where it is located, the size of it, and so many other factors).

It took new construction costs from $800-2500 down to $325 / SF and instead of 2 years it can be done in 8-12 months (design, permits, fabrication, shipping, and erection) depending on how much homeowners customized the standard plans.