Sounds like you need to have a relationship with a couple of good contractors, 40k for vinyl siding sounds high, what was the material cost.  

Definitely a strong location with great visibility and high foot traffic.Since it’s a NNN,  your expenses are minimal, but if LazyDog ever exits, buildout costs will depend on lease terms and the next tenant.

But the mortgage is still too high. 

I talk to so many people who regret not getting a PM up front because they are having problems or high eviction rates doing it alone.

you can use a DSCR loan if your DTI is too high for conventional. 

Wondering if it will be a waste in fees paid to either HELOC or Cashout Refi because there may be a possibility of having to sell to get the primary residence we want next year and end up paying Realtor fees to sell it. 

Lenders or investors who have short lock up periods but have years of experience feeding their business with new capital would give me more comfort but anyone who is just starting and is promising a rate of return or return of capital in a set period of time would be alarming because they very well could be reliant on fresh capital to make good on that promise and that usually ends poorly.

I highly recommend the book real estate by the numbers.

Knowing the average bP buy and hold investor this type of information would be for advanced investors that deal in the back end of real estate not the front end like most who just want to buy a house for under market rehab refi rent or flip. 

Case Study: A Successful Joint Venture in Real Estate - An investor identifies a distressed property with high potential but lacks the funds to purchase and renovate it. - The investor partners with a private lender who provides the capital.