First bit of advise I can give, have lot's of cash. If you start waiting to pay your trucks till you get paid you'll wind up with a very bad reputation on the internet and have a tough if not impossible time finding trucks.
Your talking about doing some specialized stuff and I can tell you that getting payment from the customer can and will take 60 days or more and unless your already very well established you won't have a chance in hell of getting a factoring company to fund your receivables. So if you do a measly $5,000 a week gross, your going to be out about $40,000.00 before the first check arrives from the customer. And let me tell you, your not going to survive on $5,000 a week gross, you'll be lucky to net $250 when all is said and done.
Then there's the whole fuel advance thing, you don't have to give advances but you'll be carving out about 2/3rds of your available carriers by not offering it.
Then there's the liability issue, and I'm speaking from experience, you will have claims that you will get stuck with no matter how many different ways your cover your ass. Insurance companies do not pay for driver stupidity. I had a truck pick up a load of specialty cheese in Green Bay, WI and take it to Stockton, CA. The driver set the unit on 50 start/stop then 12 hours before his appointment he set it down to 40 continuos where it was supposed to be the whole time. Well there was $150,000 worth of specialty cheeses in the trialer and 5 recorders. The customer opened the doors, grabbed the first recorder and Bam so the checked the second at which point they refused the load. The shipper had us bring it back to Green Bay where they checked the other 3 hidden recorders all with the exact same results. Now the owner of the truck claimed mecahnical failure but he had a new carrier unit so the insurance company (his insurance) plugged into it and got all the data at which point they denied the $80,000+ claim. Well the shipper didn't care who paid the bill but I was the carrier of record since the load was tendered to me and I had to cough up the claim. I didn't make that much brokering in 2 years but now I'm on the hook for the $80k. I had inquired several times with my insurance company concerning a blanket policy to cover such things as this and the annual cost (which has to be paid up front in one lump sum) was more than I was making total. I checked with at least a dozen companies about this insurance and it's expensive no matter who you call. In the end I filed a suit against the carrier and won the case but his trucks and trailers are/were financed to the hilt, he was incorporated so I couldn't touch him personally and the final result, I have a judgement in my favor but he closed the doors and went back to Russia and let the trucks and trailers go back to the finance company.
So my best advise, find an established brokerage company and become an agent for them so they can pay the carriers, cover advances and have the ability to handle claims. Going at it on your own is a great plan but unless you happen to have a couple million dollars sitting in the bank already it's going to be an extremely tough row to hoe.