There are currently 41 listings in Loopnet of units from 2000-5000 SqFt in your zip area, with asking rents ranging from $1.00 – $1.20 or so. The adjacent 92126 zip area has another 38 listings. Lots of listings, relatively speaking. I even saw a few under $1.00.
That means that a few of them would probably settle for a skosh less.
Rco Bernardo (5 actives) and Poway (13 actives) have fewer listings and they’re running about $.05/SqFt higher. THere will usually be a few more limitations about what types of businesses can operate there vs. miramar.
BTW, $100k – $300k is much more the exception than the rule in SD County.