New Home - Calgary Duplex or Front Garage Airdrie?

Hi everyone

We are looking to purchase a primary residence property and currently live in NW Calgary. We could either purchase a 1730 sqft duplex with a legal suited basement or a 2100 sqft front garage 15 minutes away from the city (Airdrie). The duplex and the front garage will cost approximately the same. However the front garage will not have a legal suited basement and I would need to add that. For helping us in the mortgage we would like to have a legal suite.

The duplex costs $710,000 and the front garage will cost $740,000. Both homes have 3 beds 2.5 baths, bonus room and a main floor flex room. The duplex requires a garage to be built but that's something I can do within a year.

In terms of future potential and finances, which one should we be looking at? what is the better choice? We currently dont have kids and both of us work in a hybrid position. Is it better to lock in the value of the Front garage now or start small and expand if we require in the future?