I thought TD Ameritrade charges $7/trade to buy Vanguard ETFs? I would up with them for my HSA, but the rest is at Vanguard. At Vanguard, almost all ETFs are $0/trade. Not just Vanguard ETFs - you can buy iShares, Schwab or other ETFs for $0 as well.
You should aim for 20% or 33% in international, depending on your comfort level. Start at 20% if you're uncertain.
Most people's bond allocation starts at about 10%, but as you approach retirement it needs to go up to protect what you've saved.
So I'd favor:
10% BND (Vanguard Total Bond), or $15k
70% VTI (Vanguard Total Stock Marlet), or $105k
15% VEA (Vanguard Developed Markets), or $23k
05% VWO (Vanguard Emerging Markets), or $7k
Note the 20% international should be applied to the 90% equity portion, not the entire retirement account. So in theory you'd want 18% international and 72% VTI... but this is a rough draft version.