chula-juana ? id be looking more towards the east county (lakeside, el cajon). its a bit of a commute, but its going to be cheaper than closer-to-the-shore inland. you can always do the ultimate commute though and live in temecula. its a lot cheaper, but waking up 3 hours before your shift isnt exactly glorious.
if you do decide on chula vista... if you see a street called 'highland', stop at tacos el gordo, get some carne asada tacos quickly, then get the hell outta there. fast. trust me on this one.