Maybe if you were to work in a team and you had been doing it for a while it might work, however I highly doubt it, especially on a busy server like beginners.
First problem is getting Opfor up into the bus area, the trip from store and through the alley is very likely to result in a grenade or sniper kill (any half-decent player knows to throw a grenade there or hop up onto the Marines green spawn car and to snipe any rushers, my self especially.
As for Marines, attempting to rush down to the building on the right, either down the stairs or through the wall, is likely to end similarly to the above. Opfor snipers can get to a spot where they can wallbang the door that leads to the hole in the wall, and from the same spot also cover the stairs long before any Marine gets there..
But like I said, it may work, it is the Beginners server so pretty much anything can happen ^^ Good luck though