do you think this will work well enough to leave my job in 6 months

ok i work in maintenance for a property manangement compeny been here for 4 years now. Started off as the painter and in 3 months made maintenance supper. from $12 to $18 an hr in 4 years. We mananage 12 apartment complexes and about 200 houses and i over see all departments in maintenance. Be for this i worked for myself in home improvements and for my brother who ownes a home improvement comp. with 12 men and brings in $800,000.00 a year now. From my 4 years with this comp. i have learned a lot. I want to start a maintenance solution comp who takes on work orders, make readys and section 8 inspection lists for rental property. So far i have picked up one guy with 25 apartments and i charge him $30.00 an hour + material ( 20% mark up ). so far its keeping just me busey after hrs. and weekends. I also picked up a facility maintenance compeny with 1-2 work orders a month and the lowest net pay with them is $150.00 a work order.My plans are to have about 10 of the facility maintenances comp. with pay turn around every 30-45 days and as many rental propertys i can get hire someone to do the work for me for $15 an hr. ( i charge apartment work orders $30.00 an hr ) and facility maintenance is set net pay and in 6 months leave my full time job to do my own. My thoughts was after 6 months the 30-45 day turn around for facility maintenance would be paying every day or other day depends on how many facility maintenance comps. i have and the apartment maintenance pays up on invoice turn in. so between apartment and facility maintenance in 6 months do u think they would be enough money coming in for me to leave my job and hire one guy. I have talked to my brother who ownes his own home improvement comp. and makes good and a few other ppl and they think i should go for it. any thoughts on this.