Since you are using the property and renting, you'd want to look into a second home or vacation rental loan programs.

For the owner financing. 

Initially I was planning to use a mix of cash and stocks to fund this purchase, but now having the second thoughts whether I should use  just some cash and apply to some home equity financing options instead to cover the offer amount. 

In RB for example, actively licensed properties have a window where the permit can transfer to the new owner.

Try looking at nearby comps of decent homes not fixer uppers.Rentometer - I never found these to be accurate.

Jose,There are a few ways to answer this question, first if you can buy a Primary home then Yes, $15K is enough. 

Compared to the recent pricing peak in May 2022, single-family home prices in Austin are down approximately 11%.For some broader context, here’s a chart of the median sales price of a single-family home in Austin over the past 10 years:As you can see, pricing in Austin is still substantially above pre-pandemic levels.

In Wisconsin, we have a couple of good markets for you allowing you to diversify your capital across different markets if that's your preference. 

This isn't common but we have had the following happen: former tenants, boyfriends/girlfriends staying after the lease holder left, family/friends of a neighbor in a multifamily situation, former owner or owners family after a foreclosure. 

We spent four years in a duplex, maintaining it in our rental portfolio as we transitioned to another house hack residence with an additional accessory dwelling unit-type house next door.Navigating the intricacies of FHA loans in competitive real estate markets can be daunting, given stringent home requirements and more complex processes.