Some ideas and questions I have around best approach:Do we continue to put our own money into these repairs to see through the work on the home or is there a loan or HELOC that should be considered instead?

Warranties often have limitations, like they might not cover pre-existing issues, and there could be delays if they require you to use their contractors.I'm not sure if you've purchased a warranty already, but before purchasing a warranty, it’s a good idea to carefully read the fine print to see what’s covered and if there are any exclusions.

If you have any ideas, you can ping me.

But from an investment diversity perspective, Its never a bad idea to diversify."

Quote from @Aditya Kohli: @Hamidou Keita I would recommend if duplexes are limited if you can get a 4-5 bedroom house and either rent by room for house hack or splitting a big house into 2 and adding a kitchenette and separate entrance as a more cost effective ROI option  Great idea.

Perhaps going to the local building department or title company to see who the big land buyers are in your area would be helpful for starting to discuss the idea with someone nearby?

With no direction from an Engineer (or Architect) Contractors have no idea and will price out the scope of work they think is best even if it's not the best option. 

You can take a deep look at the deals and get an idea of the kind of variety you'll see and come up with your own due diligence method (that meets your unique situation).

I like the idea of getting aggressive with class A and B locations.

Ok yeah we are thinking of getting an investment property loan so we can stay in our current home.If we did the FHA route we are considering on living in the new property for 1 year and then moving back into our old one after the year is up.We are curious if we would get a more favorable rate if we borrowed from our home equity to buy the investment property.Do you have any idea if many investors borrow from their home equity to get started?