Hard to say, it only takes one month without a tenant to lose money. You better have the cash flow to counter that. The landlords I know (not a representative sample) all have lost a lot of money as covid meant they couldn't evict tenants that were not paying rent. There are programs to get some back, but if you evict before getting money you get nothing.

In the long run you make a lot of money, but it is a long time before profits are enough to live off of. For the first years the money goes to paying the bank, insurance, taxes, and if you are lucky there is enough left to cover basic repairs.