What are you looking at in the kit? My experience says that cheaping out isn't worth it, but you may not need half of what is in the kit (depending on what's actually there...)
I started doing my own alignments this year and after spending lots of time figuring out how to safely provide a leveled environment and then wondering how to store it, I jumped for a set of scale levelers with roll-off (I was already planning the scales, got them used at a good price). That was ~$1k alone, but after getting them set up (laser + digital level) it's now ~10 minute setup time (the floor is now marked for perfect re-setup every time). And they're light and easy to stow away. Absolutely worthwhile in my opinion, but if your floor is already perfect (or just a tiny bit off) it may not be worth it. Mine isn't close. In fact, the feet on two don't actually all touch if I put them on a perfectly level surface (yay seams two ways that rise ~1/4").
I recommend springing for a camber gauge with a digital level that slides out, since the level can be re-used (my stuff is all Longacre). I found bubble levels (where I started trying to level the roll-offs) notably less accurate.
I have a string setup (DIY on that, the highest cost was the $5 I spent for bright woven fishing line that's a consistent width). I use a simple ruler with 1/64" markings.
I currently use a DIY 'greased tiles' toe plate solution, but that's not working out as well as hoped, so I may spring for a set of Longacre toe plates for next season. I may just need a different (or more) grease.
That's all I use. If you're not after corner balancing, 100% exactly level is less critical and you can get by with the string method and a good (~$300) camber gauge and greased tiles... I use
this online calculator to help.
The worst part for me was setting rear toe. Probably a lot easier with a helper.
C