Do either you or your husband hold a passport from an EU country (does not have to be France)? If not, the maximum amount of time you can spend in France is three months, after which I believe you have to leave for either 90 or 180 days before you can return.
I researched this before we moved to France because it was not exactly clear what I had to do as a U.S. citizen married to an EU passport holder.
So,if no EU passport, you and your husband will need to apply for a long stay visa by making an appointment with the French consulate closest to where you reside in the U.S. The requirements are always changing slightly but in general you must prove sufficient funds to support yourselves, adequate health insurance, no criminal background and pass a physical examination.
I don’t think, but am not sure, whether buying property automatically confers residency. You should ask the consulate. There may not be any restrictions to buying a holiday home but you may only be able to use it for a limited time each year without a long-stay visa.
Seriously, only listen and act on what you are told by the consulate, and that includes what I have written here.