There are portable stump grinders. I bought a small one to do shrubs and very small trees. It was light enough for 2 people to lift into a raised planter. It took a while to do the work but I got the job done.
http://www.northerntool.com/shop/tools/ ... pla&ci_kw={keyword}
Check with Home Depot or your local rental shop. If you decide to grind it yourself be sure to wear a proper helmet, safety glasses, faceshield and ear protection.
Since it sounds like you're going to dig and pull here are some tips.
Find a solid anchor to attach the come along. If you're going to use a tree make sure its large. Then, use wide webbing straps and NOT cable or chain. Cable/chain will damage the tree.
Make a double wrap around the shrub stumps. Get it in a place where it won't be pulled over the top.
Leave the stumps high so that you can get some leverage.
Put tension on the stump and then chop the roots. It doesn't take a lot of tension to make cutting roots easier. The come along isn't to rip the stump out it's only to tension the roots for chopping.
I've used my recip/Sawzall with a long, coarse blade to cut roots too.
If you have large trunks you're going to need a heavy duty come along. This style come along with stamped metal sides is not likely to be strong enough to pull without bending the frame:
http://www.sears.com/shc/s/p_10153_1260 ... 5125831101This is similar to the one that I used:
http://www.rescuetoolman.com/3_000_lbs_ ... -70030.htmDon't overload the come along. If a cable breaks someone can get hurt or killed.
Consider the cost, it might be cheaper to have it ground out.
Spending two days digging out a stump??? Whew...not me.
Tom