Selling Stocks for Down Payment

[Kwame Essieh]

I'm hoping to get the communities opinion on selling securities (Stocks, Index Fund, ETFs) to make a down payment. I've always been a buy and hold investor and the thought of selling my assets to make a down payment paralyzes me. It would reduce the diversification in my portfolio by a lot. 

In the past I've been able to use heloc or refinance money to cover down payments but that isn't the case at the moment. should I try to save up for a down payment or risk my assets to make a down payment.