Battletech is great tabletop war game that’s easy to get into and even more fun to explore, but I quickly found out that Battletech minis and associates are rather expensive. Thankfully there are lots of resources out there that can practically get you started playing for free! All you need is some paper, scissors, glue and some creative patience.
Solaris Skunk Werks tool for creating mech record sheets. Lots of pre-made ones too!
Not so free
ClassicBattletech.com has various downloads for free, not all useful
Ironwind Metals for official minis