Okay I understand what you're getting at, but you're in for a lot of RTFM and searching for answers on forms if you're not willing to take the the time to figure out the compatibility issues yourself. Literally coding, even if you're just copying and pasting from forms you ask desperately.
Take it from someone thats been there, it isn't worth your time and struggle in my opinion, and there's better ways to invest.
On some laptops like mine, the Ideapad 320 15AST going for 250 at walmart in midwest missouri, and has an APU capable of running half-life 2 respectively and more importantly has received amazing decent driver support (per my experience :x) Screen is bad, it's plastic, and the battery is garbage but you can upgrade it a fair bit. I mention this about my laptop but you'll see this as a theme among other laptops at this price range.
More importantly, this laptop and others of the same price maybe use M.2 for the bluetooth and wifi module card. This laptop and others with PCIe SmartCards and more can theoretically support eGPUs, but this isn't the full picture. You really ought to understand the scope of this.
It will at best give you only 10-15% degradation in performance in even the best cases. So whatever, you get a 1050ti because they are cheap. Well you will also want a power supply, and a decent one that won't make your gpu fry because you'll be saving up for a better one and won't be able to afford a short and a dead GPU. Now you have a pretty ineloquent setup, you will have to tear off the back of the computer to get access or at the very least plug into a legacy connecter not designed to take this abuse.
That, and you can't move a single thing because you have to station you computer for a good 5 minutes if you are really considering getting a cheap laptop to do this. It's not like it's going to boot up quick or be without hiccups, ever driver update or windows update might provide a challenge.
All of this and more headache and you spent 500 on a shitty laptop you tore apart to fit in a 150 budget GPU to justify the huge GPU cost and performance drop. I swear at the end of this the best case scenario is that you deal with all of this and it ends up working. Depending on skews, drivers, updates, but also very physical things like leaving the components of the motherboard exposed and reusing a fragile connecter... In my opinion reasoned here it is really, really, not worth it.
Honestly, Realistically, a decent solution is to use that money and invest in faster internet that would allow you to stream using Geforce, playstation, liquidsky, ect. You could buy this laptop for 250, be able to play some titles with an older APU. Set aside 100 to stream the games. Set aside 150/mo for subscription and to save up for a dream rig? Because the thing here I'm trying to say is you'll need to be realistic .
