How do we change from a financial advisor to a regular brokerage account without tax implications.

My partner and I are soon to be married and will be combining finances.

My partner has had a financial advisor her entire career and has saved up $500k in investments. She has done everything through a financial advisor. I looked at her portfolio and essentially her advisor seems to be mimicking the S&P 500, just with individual stock picking.

We would like to get rid of her financial advisor, since they charge a 1.5% fee. However it seems complicated since her money is in a lot of individual stocks.

Our preference would be to go to Vangaurd to self manage and have a 3 fund portfolio of VTSAX, VTIAX and VBTLX.

Is there a way to do this without selling all the individual stocks and being taxed on the gains they have had? Or would we have to deal with the tax burden to make this change.