You really don't have to spend that much to start building your own coils. I you have some drill bits from lets 1,5 to 3mm thick you can wrap around those. If you don't have these you can pick up cheap mandrel on ebay for around 2 bucks including shipping. I'd post a link but I'm not sure if links to ebay pages are allowed here.
A screwdriver with the right thickness will work to if needed be.
A vice is handy but a decent set of pliers will work almost as well with a little practice, you probably already have a pair of those somewhere. Then all you need is some wire of choice and some cotton and you can get started.
Use
Steam Engine to calculate everything for you and you should be safe.
I've started building only 6 days ago but I already don't see myself buying another pre-made coil again. I'd rather spend it on tasty juice or save it up for another mod or RTA instead
It may seem complicated when doing the research but you just have to get your feet wet. There's really not much to it. Now getting the wicking right might be another story, haha.
Watching Zophie Vapes' vids on YT is what convinced me to jump in, check them out if the name doesn't ring a bell. She's a lot of fun to watch while getting your vape on imo.