Well if you have some equipment it ain't too hard to build a track its just time consuming. I built my track with the smallest skidloader made by bobcat and an old Ford tractor with a loader. It takes forever. But my biggest advice is to do it right the first time. For instance ive been working on my track for 4 years, mainly because i took too many shortcuts i didnt pack anything in and did stuff wrong and it was destroyed and had to be rebuilt. Then when i thought i had it beautiful i bought a new bike. Changed everything. So this time i went and took my time and made it more bike friendly. All my friends have different bike sizes and brands, etc. So i built a track that could acomadate full size bikes and minis. alot of it comes to personal preference too. Like dont go build a 100 ft triple if you cant clear a 30 ft tabletop. Use common sense and things should turn out alright. My track has lap times between 1:30 and 2 min i think maybe more i havent timed in a while. But again make it safe and make it fun. To get dirt for my track i used my skid loader and started diging a hole in the ground and just kept rounding so i could drive in and out of both sides and when i was done it kinda resembled a half pipe, its quite fun to play in and then i ran the drainage off my 60 footer into that hole and it's a blast for quads when its muddy. Another thing you can do is start a ways back from where you want your jump and start sloping a hole downand at the end make the ramp you can make some nice jumps that way. just my $0.02. hope it helps.