About 90k that will be taxed at 40% if I take it now.

I now sell STRs in FL.  

You can quickly see why looking at this graph - https://www.visualcapitalist.com/buying-vs-renting-house-in-...You can see how in 2015 the average mortgage was cheaper than the average rent, so it was easier to make the math work with light value add and just buying single family homes.

Are they at market rent, or locked into below-market rates?

I would get that looked at.

I like Hemlane, which is advertised on here.

I've been a MTR/STR host for almost 5 years now with about 100 doors cohosting. most important for me are1.

Assuming you go the HELOC route, another option to reduce your costs assuming you have decent credit is to look at credit card balance transfer promotions.Back in 2003-2004 I had HELOCs on my investment properties and interest rates were increasing.

Also any tips for automating this as much as possible and how to protect the property financially and property management would be appreciated.I ALMOST understand the rental arbitrage strategy if building a company scaling with say 30 + units and looking for high short term cash flow.  

Assuming:40 hours: W2 job56 hours: Sleep21 hours: Basic daily tasks= 51 hours potential REI time💡 Pro Tip: It's not about finding time; it's about allocating the time you have strategically.🎯 Your 6-Month Timeline:Month 1: Foundation (5-7 hours/week)Morning routine: 1 hour daily market researchEvening routine: Deal analysis practiceWeekend: BP forums & networkingKey Goal: Analyze 10 deals on paperMonth 2: Education (8-10 hours/week)Complete 1 RE courseJoin 2 local REI groupsSchedule lunch breaks with agentsKey Goal: Build your initial power team listMonth 3: Systems (10-12 hours/week)Set up deal tracking systemCreate document templatesEstablish banking relationshipsKey Goal: Ready to make offersMonth 4: Lead Generation (12-15 hours/week)Drive neighborhoods after workWeekend open housesSetup automated MLS alertsKey Goal: Generate first 5 qualified leadsNow, the Owners and Brokers you deal with may not enjoy this, but you can certainly "practice" making offers.