Examples of invitation letters for a vacation?

I hereby invite Mr to come visit me during his vacation period at work. He plans to stay from Mr. and I have been very good friend since high school. I have not seen him since we finished high school. However, we have always been in touch. Ion his visit I plan to take him to famous tourist attraction in Washington DC. It will also be a great opportunity for him to see and experience the American culture and lifestyle.

I will sponsor all his expenses during his visit, which includes food, lodging, and other miscellaneous expenses. I look forward to his visit.