Unreasonable cost adjustments.

When I lived in Texas I was in an HOA neighborhood, I would never deal with an HOA again, they can completely unreasonable and hit you with fines for the smallest things.

Don't take an 'unreasonable' amount, to avoid 'equitable interest' issues down the road.You can offer seller concessions to cover their closing costs in lieu of offering 'rent credits' which can be viewed as a 'financing agreement', and subject to lots of fun rules.Keep the lease completely independent of the option; don't tie performance of the lease to the performance of the option. 

Besides the financing hurdle with LLCs, not sure why you wouldn't. 

While doing that, I faced some hurdles around getting accurate economic, demographic, and real estate market data that didn't require a big software subscription and was also hyper local.

If you're talking to any HMLs I'd be speaking with them about their hurdles, interest rates given your scenario, etc.

In my experience if a seller is dead set on anything then their expectations might be unreasonable in other areas of the contract.5.

However any bank that's good will want a down payment or attach to equity in something else you own.Some hurdles I see with any option are appraisals/valuations and/or title insurance.  

This could be because the insurance company has conducted its own investigation and believes that the damages are not as extensive as the policy holder claims, or because the policy holder has submitted exaggerated or fraudulent claims.The insurance company may be facing financial difficulties and may be looking to reduce payouts in order to save money.It's important to note that insurance companies are required to act in good faith when handling claims, which means that they must treat policy holders fairly and not unreasonably deny or delay payment of valid claims.

Owning a car, light remodeling of a house, & sharing a kitchen may be significant hurdles for some people who have difficulty adapting even considering it may mean losing the opportunity to have others pay your mortgage which can easily be $4k a month.