Advice when you're just starting out

I've been dabbling in freelancing lately. Somehow I've managed to hook some decent sized projects that will take a couple months to a year to develop. As you can imagine they all want their project started tomorrow.

Some people have advised me to as for $40-50k to retain my services. Some have advised me to ignore everyone except the current client.

Ideally I'd like to get someone(s) to help me so that I can make everyone happy.

Sorry if this isn't appropriate here, kinda' burned out from 60 hours a week and hoping for some outsiders' perspective.