What you're looking to learn you won't learn from a traditional big name company but personally having a license will not hurt you as an investor.

The debt could be traditional/convention financing or it would be private/hard money financing. 

I always talk with the landlord about the numbers and they make more via Airbnb rather than traditional. 

When the work has been completed, you will than qualify for a traditional loan which will be at a much more favourable rate.

Or simply ask yourself, would you rent out a traditional rental, for an annual lease term, without a written agreement?

My wife and I are considering buying multiple investment properties in the next 2 years or so and was wondering about the best strategy for traditional mortgage applications.

Are you currently looking for traditional financing, HML or PML?

I believe we closed sooner than the traditional 6 months. 

Also, if we do get the DSCR loan on the land and modular home, rent it for a couple years could we then convert it or refinance it to a traditional mortgage.

Quoting from https://www.nbcnews.com/news/u...With Rhino, the platform replaces the traditional security deposit to a landlord and instead provides renters with a monthly low-rate insurance policy, simultaneously providing protection to property owners.