I want to run 200 amp service 720' how much would I loose at that distance and a suggested wire size for a 1300sq ft home if it can be done as a secondary line?Im being told a couple of different things!thanks

Only have a minute, and can't give you size now, But that Is a Long run, and will be a several sizes larger for sure.
Cheaper is to have power company run high voltage and poles, and Transformer.
May be cheaper?
Underground would be nice(no poles).

No way you are going to do this easily, cheaply or even successfully.

The wire size you will need will be impossible to terminate on typical 200A equipment and lugs. If you go with copper to use smaller wire the price will shock you out of that idea.

The only logical way is to run primary much closer to the house.
Your power company will have all the specs you need.

If you are going to make this a permanent home and pay the power company, they should bring power to it. We are 400 ft. off the road and the power company, an EMC in North Georgia, ran a drop with a transformer to a point 75 ft. from the house. From there, due to terrain in the mountains, they ran another line to an intermediate pole and then 25 ft. to the weatherhead. Cost to me $0

Depends on where you are. In my area ALL underground, including primary, is the customer's responsibility.

Even overhead they will only go like 150' onto customer property, then it is on the customer's dime.

Stan is correct, many utilities responsibility stop at the property line, and the customer is responsible for extending the power line, no matter low voltage or high voltage.

When the distance of the line extension is 200 foot or greater, extending the high voltage should always be considered, as extending low voltage any great distance creates a voltage drop issue.

Mark, you have gotten several answers for wire size because voltage drop calculations are complicated and often misunderstood, require specific details to perform accurate calculations, and often calculations are not done at all or properly, and "rules of thumb" come into play, and all kinds of answers are provided.

Either you or your electrician need to consult with the utility about extending the high voltage to a point close and reasonable to the home. This may involve several poles or underground high voltage cable, which ever you prefer or are able to afford.