A land lease property is one in which the land beneath the home (or in AZ, it might also be a patio home or town home) is owned by someone else. In Scottsdale, the majority of land lease fees are when developers convert a rental property units to owner-occupied units, and/or the original owners refuse to sell the land. You'd also need to check the CC&R's because sometimes the land lease fees are tied to a certain percentage of the new buyer home price.
The downside is that these properties are sometimes harder to finance and consequently harder to sell, possibly reducing their resale value. Often times, there is a monthly HOA (Home Owners Association) fee in addition to the land lease fee.
The upside is that properties with a land lease fee are usually sell for less relative to other nearby properties.
There are quite a few Briarwoods in Scottsdale. Comparing Briarwood(s) One through Four in the 85050 zip, there are 11 for sale. Of the 11 homes for sale, there is one bank owned, one short sale and one owner agent, ,so it's a very stable community. Prices range from $138,900 to $399,500 (1,913 to 2,242 sq ft). The smallest home has 1,518 sf and the largest one has 2,697, priced at $199,900 to $295,000, respectively. Land lease varies from $225 to $988 per month and the HOA from $93 to $200 per month. These fees varied by Community as opposed to sq. footage or price, but you can see that would add quite a chunk to your monthly mortgage and many people don't have the cash or income on hand.
You'll need to "run the numbers" to see if the lower price makes sense when you add in the land lease and HOA fees. One other fee that comes up in certain parts of Scottsdale as well as the Biltmore Area is a "PAD" fee -- this is a "planned area development" fee. This fee is usually lower, the one I can think of off the top of my head is at Sandpiper (in McCormick Ranch) -- their PAD fee is only $185 annually.
Good luck with your home purchase! Yvonne