Please consider the cost of starting a lawn in sand. Most respectable grasses don't do well in sand and need water, lots of it. I'm talking Sand, not talking Sandy Soil, it appears there is no soil in your picture. Best 0ptions are good Sod or Zosia Grass which is brown a good portion of the year. You may want to bring in a few truck loads of topsoil. Next thought is a timed, automatic sprinkler system. Since I presume you will not be there full time, a sprinkler system would be a wise choice. Then consider your water bill increasing unless you have a well. I would strongly consider a nice sampling of native plants and ornamental grasses along with some bordering, possibly with river rock. Definitely some vegetation along the foundation. Unless you trust your "Landscaper" you may want to talk to Shannon Brooks at the NC Extension Service in Manteo or possibly Kath Mitchell, the Aquarium's Horticulturist who gives very good advice. There are locals who are classified as Master Gardners who should be able to give you some advice. Good Luck
Ditto. We used Alpha Advantage to lay our sod (centipede grass) and install our sprinkler system. This is coastal desert and you will need someone to maintain your lawn also. I am glad we did it, however, I live in our home. Good luck, no shortage of good landscapers here but there is a big difference in what they charge.