In terms of the new mortgage, the lender will look at what's called the Debt-To-Income ratio. This is your monthly debt divided by your monthly GROSS income. Depending on the mortgage company you go with, this ratio is anywhere between 45%-55%.
Now your monthly debt is consisted of any revolving credit card, installment, or auto loan that shows up at the time a company pulls your credit PLUS any monthly housing expenses. This includes taxes, insurance, and HOA (if applicable). What they would do is take your annual taxes and homeowners and divide it by 12. Because you and your husband own other properties, all of those properties' housing expenses will be needed to be included in your DTI calculation. HOWEVER since you guys get rental income, this can be used towards your income so it should offset some of those expenses.
At the end of the day, it's going to come down to if you qualify or not after somebody takes a look at your financial situation. I would recommend going to a bank or mortgage company for a pre-approval so this way you will know if you are able to purchase, and pre-approvals are free.