New Here

[RP14]

Looking for advice to where to start on building RC Construction equipment. I mainly want to build an excavator, then a dump truck, dozer, maybe a conveyor belt. Need to dig out my basement when 40 below weather hits here in North Dakota.
Where is the best place to start, plans?
I bought John-Tom excavator plans, all is plastic and thought about using steel or aluminum. Wanted to make sure this will work first.
Saw a few kits online, but no answer, must be out of business???

Thank in advance