Interesting experiment

I have a bit of a conundrum for you all. Here's the setup:

You have $20,000 to spend, but you don't have to spend all of it.
Your dollar goal is $3000
You can only spend it at one registrar/hosting company. <-- this is the most important part.
Your priority is speed, while minimizing losses. For example, if you made back 75% of what you invested in a month, then got deindexed and had to scrap your digital properties, that would be preferable to not making anything for three months and turning a profit by 6 months.
While you can't do anything illegal for this experiment, you have no moral compass.

For reasons I'd rather not go into, I've found myself in an experiment much like what's described above. I've done some research on things to fit this set of rules, but everything I'm coming up with requires money to be spent in multiple locations, i.e. paying for links to a parasite, buying GSA, paying for multiple hosting accounts for a PBN, etc, has a very high risk involved or simply takes too long.

The only thing I've found that comes close would be to buy auctioned domains and relist them, but the market seems so volatile and based on emotions more than rationality. I've seen domains with great stats get sold for a decent amount only to be resold a short time later for pennies on the dollar.

I keep thinking that there is something I've overlooked, or maybe something I've already looked at and dismissed because I didn't fully understand it.

Anyone want to take a stab at helping solve this experiment?

I should add that I'm not necessarily opposed to spending a small sum of money (a couple hundred at the most) elsewhere if I absolutely have to, vut am trying to avoid it if it is at all possible.

Why not just buy a site that's already making money then scale that up?

The site might not be clocking 3K per month but you may be able to scale up its income by investing in more links/outreach/etc

I bought a domain on auction that looked promising. After a couple of weeks, a little bit of work, and a lot more to do, it's bringing in just under 1000 visitors a day and is starting to convert. This is the site I am working on scaling, but would like to free up some of the cash I have tied up at the hosting company so I can start buying guest posts and building my own pbn, not to mention a couple pressing bills are coming due soon.