HELOC would not be a bad idea.

We just don't want to hold them and deal with what comes with it...but it's great for others. 

A better idea would be to sign a new lease agreement at this time, plus or minus an option to purchase.

I'd like to get an idea of what is costs to build from scratch.

Second, they are often aware of most operating expenses so should be able to give you a good idea of just what their turnover has been, staffing costs, and how they would run your home.

Hey @Wyatt Nauman,I think you have the right idea and investing in real estate anywhere is a great plan! 

Step #PhaseStep1DiscoveryTalk to experts and learn (process, tips, design tips)2DiscoveryCreate social media and document story3DiscoveryGeneral research - budget considerations, financing options, permits, regulations, tax considerations4DiscoveryMarket research - competitor analysis, analyze guest reviews, market trends5DiscoveryGather ideas/inspo (blogs, articles, youtube)6DefineCreate brand and vision7DefineCreate guest requirements (e.g. coffee maker, natural light, near activities, etc.) and prioritize must have, nice to have, etc.8DefineSketch idea for look and feel (architecture and design) - map out the floor layout9DefineConsult an architect (is this needed?)

Does this overall strategy sound like a good idea?

I would not keep it if you can't find a way to get the cashflow out of the negative.As Randall mentioned above, you want to avoid capital gains tax by holding it for 2 years. 

I looked at GPS tracking, but they need batteries changed frequently, and a monthly fee to be paid like a cell phone bill, any ideas would be greatly appreciated.