Hmm... seems like framing a floor vs cement could lead to moisture issues (or maybe not otherwise why would they allow that option)...

Do manufactured/mobile home dealers provide seller financing option to buyers? 

First option is to sell the house immediately and utilize those funds (~100k) to supplement the cost. 

In the middle of those two extremes might be a small business with 3 years left on their lease, but they've made improvements to the property that aren't cheap to remove, such as perhaps a dental office (dentists might be pissed that I put them in the mid-risk category, but all the dentists going out of business in 2020-2021 taught us that American consumers apparently regard dental care as an optional and "luxury" spending item). 

I've thought of a HELOC but looking for a longer term solution.Are there any other options?

Same for backyard - even if it's small, cutting it in half with a fence makes it easier for both to enjoy a holiday barbecue in their own space.These are low-cost options that will help create a better relationship with tenants.

However, the good news is that there are other planning options available where you don't need a real estate license.

The house will cash flow but the property comes with a great newly built barn with a slab and all.Now when my brother and I both left for college my parents had no use for a golf simulator that we had in our garage so they offered for me to use it at a property.This would for sure add a lot of value to bookings but I cant decide if the $50 - $100 a night or so increase (just a estimate) is a better option than spending the 40-60k to turn the barn into an ADU / separate dwelling to add cash flow and equity to the property. 

As a licensed realtor in California, I'm eager to leverage my expertise but also recognize the value of community insights and collaboration.This is my first post here, so I'm not entirely sure of the usual depth of information shared, but I'm open to discussing all options and grateful for any guidance or suggestions from this esteemed community.Looking forward to your input and advice.Best regards,Benjamin Carter

The great thing is having these options and being able to test them or pivot if needed.