QUESTION: Fix punctuation: Whether you plan to relocate or purchase a holiday home rental or investment property we are here to help you
ANS: Whether you plan to relocate or purchase a holiday home, rental, or investment property, we are here to help you.

QUESTION: Fix punctuation: A demanding but certainly also very stimulating work
ANS: A demanding but certainly also very stimulating work!

QUESTION: Fix punctuation: Outdoors to add the ability to resist corrosion and UV radiation polyurethane coatings are used together with epoxybased primers
ANS: Outdoors, to add the ability to resist corrosion and UV radiation, polyurethane coatings are used together with epoxy-based primers.

QUESTION: Fix punctuation: If you are looking for a Farmhouse with Restaurant you can taste regional specialties and taste typical local products and in some cases take an enogastronomic tour for the local wineries
ANS:
If you are looking for a Farmhouse with Restaurant , you can taste regional specialties and taste typical local products, and in some cases take an enogastronomic tour for the local wineries.