Remember that brushless ESC's generally fry the electronics like motor and battery when they let go...ask me how I know this...lol
If you get them too hot (weather hot, slow going etc which is far harder on the electronics that going fast) and they are a cheapie or simply underspec'd (i.e. too affordable) and it goes, then that is going to expensive...especially if you can't get the lipo out quick. A couple of mine fried so quick, if I hadn't had the lipo there able to pull in inside 3 seconds, I would have had a lipo fire. Truck stunk after the flames from the burnt out motor and ESCs. Brand new lipo got seriously hot in those 3 seconds.
A Bomber needs a sensored setup which is expensive. Do not get a 60A ESC! For crawling and bashing you realistically need an affordable 120+ amp ESC. A non sensored rig will be horrible for something that crawls even a bit...it'll be useless and you might as well get a Yeti or Rock Rey which are clearly better bashers.
Brushed on 3S with a 550 size motor is fun and a great all round water tolerant, affordable to replace setup. It's the best affordable setup by miles but it doesn't do Rock Rey fast...not even close. For $60 and a $15 3S 2200 lipo it's a bargain though and the Bomber won't even need HD diffs.
Throw a good brushless setup in a Bomber and instantly start spending up big to keep it together. The truck just isn't designed (like the Yeti) for 3S brushless usage which is why there are $1,000 Bombers and Yeti's going for $400 used. Guys get frustrated with them blowing stuff all the time and need to add lots of billet parts. They still don't go crazy fast with all the gear (my 3150kv 3S Yeti doesn't really go that fast either compared to the Rock Rey but it's fine for rock racing). They are crawlers and rock racers and not dedicated jumpers and bashers. Wrong truck for the job IMO but that doesn't mean they aren't lots of fun for their intended purpose. I love my Bomber. It doesn't need to go crazy fast to be great fun