You can get started with rent to own/lease option or another creative strategy like buying subject to. 

As a former employee of Kristin Witherspoon, I was subjected to repeated instances of non-payment, which is a clear violation of basic employment principles.

I would assume that if its for a short term loan, it would likely be better terms with the HELOC but I dont know much about the subject honestly. 

You could tell them to cancel the listing and you will find someone else to list it after a month not 4 months (the market take is subjective too, all dependent on what your house has compared to others, where it is located, the size of it, and so many other factors).

Be mindful of short-term capital gains tax, as profits from flips held for less than a year are taxed as ordinary income, and frequent flipping may result in self-employment taxes.While profits from flips do not qualify for 1031 exchanges (since flips are considered inventory, not investment properties), you can minimize your tax burden by deducting allowable expenses like renovation costs, loan interest, and holding expenses.If you're considering diversifying into rentals, explore opportunities to benefit from long-term tax advantages such as depreciation and lower long-term capital gains rates.

Well, what would be happening is that your buyer would be buying your house subject to the existing note, since you can't legally sell the property without paying off that note or transferring the debt to the new buyer.

Avid reader on the subject.

Quote from @Devin James: Quote from @Jay Hinrichs: this is a hugely subjective question. 

I am not an expert on the spanish tax system but I am reading upon it - It appears that your worldwide assets(Properties in the US) would be subject to Spain's 'Wealth Tax'.Spain is a great place to live...but their tax system is killer

Here is what the IRS says on the subject: Election for Husband and Wife Unincorporated Businesses A business owned and operated by the spouses through a limited liability company does not qualify for the election Only businesses that are owned and operated by spouses as co-owners (and not in the name of a state law entity) qualify for the election.