If you send some pics including some wide shots of the potential access for a three ton truck and a chipper I might be able to give you some tips to save $. What are you intending to do with this space? This will determine whether stump removal is part of the job.

Definitely not accessible with a truck and chipper, I can take care of the tops once it's down and cut into something I can finish with my regular sized stihl (can't think of the size off hand). This is just spots I'm thinking the forest to eventually become silvopasture, so no need for stump grinding, if I need it, I'll do it in a year or two. These trees are 3-5feet in diameter and I just need them gone to open the canopy.