When you buy a Condo you'll be taking out a mortgage to pay for the condo and your monthly mortgage payments on the condo will depend on the price of the Condo you're buying.
Some Condos cost around $1,000.00 to $2,000.00 per month for the mortgage payments and then you usually have a Condo Association Fee that is usually monthly also that ranges from $100.00 per month to as much as $500.00 per month.
I would personally just rent an apartment or Condo if I were not looking to buy a home with some land because you're really just apartment living sorta when living in a Condo.
If I were paying a Mortgage I would want to buy a home separate from neighbors and I would avoid homes in HOA areas where I didn't have to pay those fees just to be told how to keep my property.