OP, Reality Check

Hears my thoughts, please tell me yours.. I would like to put down on a good low miles used kenworth t680 next year $100,000 dollars. I would still have ample funds to try and avoid other operating fees. I am thinking of leasing with Landstar since they seem to give me the best self serve freight with time off option. Don't like the 35% though. I have been in trucking for 18yrs both long and short haul, need about 6mons flatbed expirence thou to have more pulling options. My idea is to run busy times hard and try to average 2400 per week for 46 weeks running more south in winter. I would be running most weekends and at times getting a camp site durring the week for my 34 restart. My questions are can i net 40-45,000 dollars running this plan? Also i would like to know if i will be still contributing to Social Security enough to provide adequate benifits when i retire should it still be there for us? Any good spread sheets available that give a detailed breakdown of all expensives that the business would incure?