They are extremely lucrative and if you already live in Scottsdale, it would not be difficult to manage yourself and save some fees. 

It shouldnt be difficult for you to reach out and work with wholesalers in the areas you are marketing for deals.

I would like to know if I could us my solo 401k to cover the deposit, and obtain a mortgage from a bank for the balance.

We all know connecting with some agents/brokers are difficult. 

The property is in an estate and there is one daughter who myself and my lawyer are having a difficult time locating.

For this deal to work, we'd also need to reduce our repair costs to something around 10k .. which would be difficult if not impossible to accomplish.

Which windows strike the balance between low cost and good quality in your experience?

However in many markets finding a deal like is very difficult and takes lots of experience.    

If you buy real estate in a decent area with healthy cash flow (after a realistic and conservative analysis, it is difficult to go too wrong. 

I understand there will be interest, but I didnt want it amortized like a traditional mortgage. 7% and payments divided evenly so that if we refinance in 2 years we have reduced the balance.