Heh, actually... when you solo, money is going to be the least of your problems. Seriously, I did not use any Bag of Holding in the beginning, and I still managed to afford the Robe of Vecna just one quest after meeting Gaelyn Bayle.
After some time, I just got sick of picking up loot to sell, because I was overflowing with gold.
Anyhoo, some guidelines with regards to the spell list. Take every fight into account and make sure that you can counter them when the time comes. Keep a healthy mix of offensive, defensive, summoning and counter spells. Try to have at least one offensive spell per spell level.
The following is my recommended minimum for Sorcerer stats. Some choose to have lower STR, but I feel you need some STR because you want to carry stuff other than your robe.
STR: 12
DEX: 18
CON: 16
INT: 10
WIS: 18
CHA: 08
This is a total of 82 stat points.
My SoA equipment setup is as follows, with alternatives in my Bag of Holding.
Armour: Robe of Vecna
Helmet: Pale Green Ioun Stone
Gloves: Bracers of Defence 3
Amulet: Amulet of Power
Girdle: Belt of Inertial Barrier
Cloak: Cloak of Protection +2
Boots: Boots of Speed
Ring1: Ring of Acuity
Ring2: Ring of Wizardry
Weapon1: Staff of Magi
Weapon2: Sling of Everand