Economical would be subjective, the hobby is not necessarily cheap, you could start with used, bare in mind that many services are switching to digital, it used to be that was analog, but the places you have mentioned including the mint are digital & encrypted so no chance there, others are digital DMR or NXDN two most common types , I would suggest the Whistler brand they do both formats,there is lots to listen to and a steep learning curve for a noob, but ask anyone who scans and will say it is a great passive hobby,
You will have to look on-line as closet retailer to you would be Toronto, other wise WWW is your friend, I ile ebay and also Craigslist as many people prefer selling local,you can look at the wiki here and see if the aforementioned brand would suite you , fortunately or unfortunately everything Q&A wise is online, as you can no longer go to a Radio Shack like I did back in the day..Happy scanning & good luck.