I can add more homes to my park and have a much better return for my money x2 but I don't plan on refi my parks in the near future or if ever.. so every dollar is sink will stay..If I buy a duplex I may have a smaller return but I have the flexibility to refinance and move onto another project..Hope this gives you some ideas..

This market is always changing, which means investors need to be flexible.

If you can't get approved through a standard lender try seeking portfolio lenders or small local banks that keep their loans in house and can be more flexible with their lending standards. 

If you have a flexible lender that you think may be able to help me, please feel free to message me with their info.  

(not so important but if they only require 15% down on a single family home that is usually a good sign that you are working with a flexible lender) Can I change title to my LLC?

In that case, look for flexible interim financing that will allow you to pay off without penalty and then rely on the increased value to lower your equity requirement when you refi.

Would it be an easy transition for you (currently have flexible work?) 

However I will use your advice and the scope of work will not be my end all be all, it needs to be flexible and adjustable.

They usually have more flexibility on their lending guidelines.

They have sometimes have more flexible underwriting on SFHs in my experience.