Owning and running a stable is A LOT harder than any other business....
You might want to really gather your facts about everything such as...
Who will clean the barn?
Who will manage the barn?
Who will give lessons?
Do you know where to get good quality hay?
Good quality feed?
Have multiple vets that will come to your barn for emergency?
Do you know how to do first aid on a horse?
Do you know how to judge if a horse is sick?
Do you know how to take TPR and VITALS (or your Barn Manager must know)
Do you know how to deal with manuer?
How to dispose of it?
Do you have the financial means to buy the property?
Why is it being sold in the first place?
Do you know how to deal with barn drama?
Do you know good farriers?
Did you price out the cost of feed, bedding, hay, water, new equipment
Do you know where to get legal contracts for boarding and lessons?
And sooo much more!!
I would also skip the breeding idea as you loose way to much money doing so...