Without regard to general investment considerations, considering only the mechanics of "monthly payments."
Mutual funds pay out dividends; depending on the fund, it may be monthly, quarterly, semiannually, or annually. And depending on the fund and what it invests in, those payments may be fairly equal and steady or highly fluctuating. It also makes distributions of capital gains, if any, usually annually near the end of the year.
When you buy a fund, you can specify whether these distributions are reinvested back into the fund, buying more shares and making it grow faster, or paid out to you, and you can change this at any time.
The only Vanguard funds that make payments monthly are most of the Vanguard bond funds, such as Vanguard Total Bond Market Index; and the Vanguard Managed Payout funds. In both cases, the monthly payments are least reasonably steady and roughly equal. The Vanguard Wellesley Income Fund also makes reasonably steady payments but they are only quarterly.
For the schedule, go to the page that describes
All Vanguard funds and click "distributions."
For any fund at all, any fund, you can set up an automatic withdrawal that is anything you like, completely independent of what the fund itself is earning. These withdrawals can be any size you like and with a choice of intervals, but for withdrawals the shortest seems to be monthly. So, you could invest in any Vanguard fund at all, and tell Vanguard to pay $400 a month into your bank account. It doesn't seem as if you can do it weekly, alas. There's no control over whether your fund can "afford" to pay that much. If you withdraw more than it earns, your fund's balance shrinks until it's all gone. If you withdraw less than it turns, it grows.
With regard to how much, these days all safe investments are sucky, that's just the way it is. There's no reward without risk, no special magic at Vanguard, and something like a Vanguard bond fund is not going to pay you a whole lot more than, say, a bank CD.
I am constantly talking out of both sides of my mouth with regard to the Managed Payout funds. I don't like 'em. I don't use 'em. But someday I might.
Now, here's how they
might apply to your situation. The minimum investment in them is $25,000. If you put $25,000 in Managed Payout Growth and Distribution, here's what will happen, according to [url=ttps://personal.vanguard.com/us/funds/vanguard/ManagedPayoutList]Vanguard's web page about them[/url]. Initially, it will pay you $95 a month. So, not McDonald's, but not a fancy sit-down restaurant either.Maybe the neighborhood "family casual dining." If you put in $100,000, you'd get $378 a month, by golly that's Cheesecake Factory territory. That amount will get automatically adjusted every year, could go up or down. The underlying investments are actually moderately aggressive; if the stock market booms, you will indeed get some growth. If it doesn't, it will shrink and your monthly payments will get cut. These are tricky and complicated funds, if the idea appeals to you take plenty of time to make sure you understand how they work and what stuff they are investing in.
The reason I think they're relevant is that they do two things for you: put you into a pretty darn aggressive suitable-for-the-long-run kind of portfolio, while paying you regular dining-out money every month automatically in a way that adjusts to how well the fund is doing.
Annual income twenty pounds, annual expenditure nineteen nineteen and six, result happiness; Annual income twenty pounds, annual expenditure twenty pounds ought and six, result misery.