Advice on second property

[Edward James smith]

Hello, I recently just bought my first property being a 4bedroom/2bath home. Home has an additional 1 bedroom/1bath apartment downstairs with its own separate outdoor entrance. We are currently living in the top floor with the 4 bedrooms while we have a tenant living in the apartment. Our plan is to eventually rent out both units and buy another multifamily property. The main concern I have is saving enough money to buy another property because I’m assuming it will require 20% down considering it will be our second property. My fiancée both have good paying jobs but it might take longer than we want to save enough money to buy another property. Does anyone have any advice or suggestions?