Here is a life tip for you. Whatever you are doing, avoid the cheapest offer.
Yes, it's cheaper because it's worse. People see a 150bhp car and a 200bhp car and think the power is the only difference. It's not. Suspension, transmission, loads of things will be different. For example VW use a bigger turbo and stronger gearbox with higher power engines. BMW use different pistons as the power increases. They look the same and are physically interchangeable but the more powerful engines get stronger pistons.
Years ago I called a company down South who'd had a feature in Performance Ford magazine where the'd upped the power from a little Ecoboost Fiesta engine from something like 90bhp to about 160. The guy at the company said 'Yeah, you can do this, but don't!'. He explained that they'd done it as a showcase to demonstrate what was possible but that it was a really bad idea in real life as nothing else about the car is designed for that kind of power. For example he said that the gearbox is not designed for the power and it will break.
Another reason it's cheap is that people who mod their cars often do not tell their insurance companies. Which is a really bad idea. You crash bad, they will find out and they will walk away. I read a story once of a girl who was left with a £60K bill.
And you don't get the money spent on mods back. It's often even worse than that as modded cars are usually hard to sell. Years ago I was looking at Focus STs and I had a guy with a modded one literally begging me to buy his car. He'd been trying to sell it for ages and no one was interested. Most buyers do not want a modded car. I wouldn't touch one.
Drive round any council scheme and you'll see broken modded cars gathering dirt in front gardens. To mod cars properly requires deep pockets. Doing it because you can't afford a powerful car but really want one is a recipe for regret.