You’ll never have all the information for a perfect decision.

On paper the idea seems perfect, but here are some potential issues. 

There is no perfect software out there.

If my core competency is out of season, I’m perfectly happy managing the hell out of the properties I have left, and playing golf when the gift of spare time comes around.Since I’m not worried about raising money for my next fund, I’m free to “tell it like it is” (which I’d do regardless), and make unpopular decisions that bolster our chances of success, knowing full well that after issuing difficult news our investors would be lighting up forums on LFI, 506 group, and BP.  

The roof leaks and has to be repaired by the time the rain comes and there's no heating or AC units.The partner’s focus on finishing the project to perfection rather than timely completion has further delayed progress, and our financial situation has worsened as we struggle to pay the mortgage.Given these circumstances, we’re considering selling the property.

Google search "investment property heloc my perfect mortgage".

The perfect mix was luxury glamping that I could invest in for short term rental use.How did you find this deal and how did you negotiate it?

Same for emails, voicemails and texts.It doesn't sound like you were represented by a buyer's agent and this is a perfect example of why a good Realtor is worth his weight in gold. 

It sounds like my situation would be perfect for the 89.99% loan to value.

Trying to perfectly time the market can be challenging and might lead to missed opportunities.