M.F.
Hi C.,
My advice is to wait till your son is out of college. My mother got remarried while I was in college and it increased my expected family contribution (the amount the college expects your family to contribute to your education)by almost 30,000 a year. My family was not helping me pay for college so that burden fell entirely on me. The only way I could afford to finish college was to marry my boyfriend so that we could be considered financially independent. In order to finish school my husband and I married at the ripe old age of 20. We would have married eventually anyway and over 5 years later we are still happily married and expecting our second child...... but if you don't mind waiting a few years it will be easier financially for your child still in school.
Best of luck and Congrats if you decide to go for it!