hi im self employed i do a day a week mobile and the rest renting a chair in a salon.
I have to say for me, being in one place wins hands down. i have gradually wound down my mobile as within the next year i want to have my own salon, but still with the one day i am running here there and everywhere, paying petrol and carting stuff about to various places and they always keep you longer then u can allow for! lol
the major plus to me in the salon is the fact i can have two / three people on the go at one time. overheads may be higher but turn over is better, and ur using the whole salon's name as well as ur own to get clients through the door. look at it as a roof over ur business as i do.
also its goin to depend on the hours u want to do, i would have thought if u would prefer evenings, mobile would be better and u can suit urself to a degree as to when u want to work. although saying that, the industry can be a little thickle as to u having time out, or changing the hours and days u work too regularly, they prefer to be structured and know that in so many weeks time they will have it done same day same time etc. as most people have that same day off from work every week if u catch my drift.
what ever you decide to do its goin to be a starting block for the future and then u can work out what way you want to go in time
hth!! good luck!