You can get a mortgage without a job, if you can show that your future income will support the mortgage and prove it. A bank will want to see that the property can realistically earn the needed income to cover the mortgage, upkeep, insurance and all the extras. They will also likely want some proof that you know what you are doing, as having years of experience developing and maintaining rental property. The rental income must be realistic for the area and property and they will want to see that you have enough skin in the game (equity down payment), so that you will not abandon a project if it takes time to find a suitable tenant. Generally, you can expect to receive 10 months of rental income every 12 months and that income should cover 120% of your estimated expenses.
So for example a rental of $1,000/month would generate $10,000 a year which would cover $8,333 of mortgage plus expenses. That means at a 5% interest only mortgage. You'd figure maybe $6,500 to pay the mortgage or a loan of $130,000. A conventional mortgage would be less, maybe $110,000. If you put down 20%, Then its a $137,500 property. The question is: Can you buy a property for $137,000 and rent it for $1,000/month easily?