If you do not own a piano you should purchase one. In my experience, students relying on practicing at a relative or neighbour's home ended up having an infrequent practice schedule and advanced quite slowly.
You'll need something with 88 weighted/touch-sensitive keys and a working damper pedal. Weighted keys are necessary for developing working technique. Acoustic pianos are more desireable than plug-in for that aspect.
Here are some potential options I've found, leading up to the best option, although your budget will ultimately decide what is best for you and your family. (Note: Digital pianos are much more realistic and desireable than keyboards.)
1) Used digital piano: There are often digital pianos listed on Kijiji.
2) New digital piano: Costco often has digital pianos, 88-weighted keys, working pedals. I actually teach from one (Casio brand) in my home in Caronport (and can hardly wait to be saved up for a good, acoustic piano!) But I think my family paid around $2000 for it several years ago and it is the next-best thing to a real piano in my opinion.
3) Used pianos: There are often acoustic pianos available for very cheap! I follow many local Facebook auction/sale groups and have them set to notify me when pianos are available. So far I have connected about 5 students with used acoustic pianos. Quality will depend on the individual instrument, if it has been tuned annually ($100-150/year) and if it has been kept in a fairly consistent temperature/environment.
4) Piano rentals: I've looked briefly for these in Saskatchewan and cannot find them but these programs are other places so may be here too.
5) New piano: I have chatted with Glen from St. John's Music in Regina and their most popular upright piano is the Yamaha B3. The U1 is a more impressive instrument and costs more. Inquire on prices by phoning them or asking me what I have discovered.
I suggest getting the best piano possible for your budget. :)