Linden Lab gives you 512sqm of tier* "free" with your 9.95USD/month premium account.
For slightly less money per month, NinjaLand Rentals gives you 2,048sqm of tier per calendar month.
Tier Rental rates are (number of square meters) x L$0.25 = weekly rental rate.
2048sqm x 0.25 = L$512/week
(L$512 per week) x (52 weeks) / (12 months) = L$2219/calendar month
L$2219 is approximately $8.04USD
IM Skye Whitcroft or Teresa Boyle for more details.
*"Tier" is the ability to own mainland. You have to actually find & purchase the land yourself. The land does not come free.