well..... while it can* be expensive to live here - it is also heaven on earth there is a huge range of available options and price points. you can board at super fancy or non fancy - as an example I have boarded at barns that charge 450/month for full board care and upwards of 1k/month for similar.
so as in all things - it all depends on what you want, how much you can afford etc.
i would suggest coming out for a looksee and travel to the various parts of the state.
It will be pricey to send the horses out - i spent a year in ON and it cost 3000 to ship my horse there and back. it cost a lot more to ship my possessions. it was all worth it tho as it was a great experience