Your design background is a great asset for real estate investing.

Our lot size is 7300 sq ft and main house is 1700+ sq ft.Location: San Jose, CA- We were thinking to potentially design the ADU such that we could have a wall (or a door) that allows us to separate the ADU into a 1 bed/1bath for self use (or rental) and another part which could be rented separately on AirBnB as needed.

@Nishan Akwalia The most important factor is actually who the tax payer is for the property.

When a husband and wife jointly own a residence, and the husband takes out a Home Equity Line of Credit (HELOC) in his name only, the spouse's involvement and liability can vary based on several factors, including state laws and the lender's requirements.1.

Your property type and location are key factors in determining this.

Invest in Opportunity Zones: Reinvesting capital gains into Qualified Opportunity Funds, which invest in designated low-income areas, can defer and potentially reduce capital gains taxes.6.

Now, some of these answers will depend on what state that property is in, how much equity you have, and a couple of other factors...but you can certainly seek out other lenders about a Line of Credit on an investment property.  

These methods are designed to fail.Keep This in Mind:The issue isn’t wholesaling.Wholesaling is just getting a property under contract below market value and assigning it to a cash buyer.

Another factor that works well with US investors is that the local currently AED (Dihram) is pegged to the USD at 3.67~ AED per 1 USD.For long term rentals, its on average 5-8% after the “Service Charge” reduction.

I'm not handy at all, but I am good at design and can do small things like landscaping.