I'm mid 30s with a good job and several 6-figure portfolios managed through some wealth management advisors. One of the portfolios is for growth at a 85/15 stocks to bonds, the other is more of a 50/50 split. I don't think that matters all that much for the question I'm going to ask.

I've put some money on RobinHood for stock purchases 4 months ago. Bought $10k worth of stocks mostly in companies that I know pretty well and want to hold for 3+ years at least. They're up 4% or so since, so they're doing alright.

I put another $7k on there recently. I was going to purchase several Vanguard ETFs (S&P index, mid-cap, small-cap, and one other).

My question is, for this amount of money, does it make sense to buy several ETFs with that $7k, or just buy one, or does it not matter either way? Wasn't 100% sure if there were any upsides or downsides (fees, etc). It's not a ton of money in relation to my other portfolios, but want to know if I'm there's something I'm not thinking about before I pull the trigger.