Lots of great advice as to the benefits AND pitfalls of owning/caring for a horse on your own property.
I am also in the "wait until you have some knowledge under your belt" group.
I've never personally (ie, my own horse) dealt with choke, colic, and a bunch of other illnesses, however I would recognize them.
Those words "recognize them". Choke and colic are life threatening things that can happen to any horse at any given time in their life.
One of my TWH's has been with me 22+ years; he was never sick but developed a metabolic disease that has, in turn, caused a few other illnesses. He colicked on me nine times last year, the first two kept the vet here way past his bedtime.
I "recognized" what was happening - if I hadn't, I would have had a horse to bury by the next morning.
You have a one year old, plus moving and trying to get organized that way.
For now, my best suggestion would be to take an on-line course in horse management and health.
You would have the benefit of learning while still being able to keep a serious eye on your baby.
Even if the on-line course cost money, it is still a lot cheaper than just jumping into a horse. Including watching out for unsavory people that will sell anything to any un-witting person, which is another subject.
If you Google "horse ownership classes", you will several hits. Hopefully someone on here might be able to recommend a credible on-line class.
To put things into perpspective:
You have a facility that is pretty much "good to go" for a horse.
You have a baby at the edge of "toddler stage" that will want to be sneaking out the door and go exploring by itself, if it can get the door open.
The baby is nowhere near ready to explore his outdoor world alone, anymore than you are ready to become a first-time horse owner
You both need to learn "the rules" and neither of you can do that without experienced help.
Your baby needs your experience and you need the experience of a good horseman and maybe a quality on-line course to get you started