Give them a portion of the profits from the STRs and have a buy-out clause when you have the funds to refinance.I am sure there are many other potential options for you to look into, but just off the top of my head these 5 came to mind.

Your best bet is to read information from public blogs that approach both options objectively.

With $30k, consider leveraging financing options.

Do not wait for the 30 days.A couple of options to raise money: If you receive at any given time a return during tax season.

Ozaukee County would certainly be in my immediate plans, Milwaukee would be definitely be an option in the future.

Over the next 3 - 5 years I plan to 1031 exchange all of our single family homes and purchase another 40 that won’t have mortgages (we use the lease option model to sell our properties to maximize profits so we cycle through properties every 3-5 years).

.), easily get cold feet, battle financing issues or sometimes just ghost you at closing.Selling a home to a tenant is probably the better path (lease option), but you really have to work with them every month and coach them to get them ready to buy the home, otherwise, 70% will not execute. 

It'll add about 80k to the cost but is a much cheaper option that tying up square footage for an indoor pool and dealing with the risk of moisture and mold issues.

I have considered renting by the room but think it might make managing all the tenants difficult so I have tried to stay away from that option

Another option is using different creative financing strategies - it's all about how you'll structure your deals.