there is no set limit you need, what your friend or you need (if your supporting her visa app) is at least enough to fund the trip (to pay for air tickets, travel insurance, accommodation , food , etc (if your not supplying it))
good reasons why your friend will return back to the phils after her trip
a letter of support like this should help.. http://www.londonelegance.com/transp...tionLetter.pdf
visit visa's are a lottery, you could have no money, no job and be granted and someone else could have a business, money and good reasons why they will return and be refused![]()