Objective minimum MF investment?

1. How much do you think is a good minimum amount of investment in MFs on a monthly basis objectively (and not simply as a percentage of income)?

(Good implies a reasonable amount that can offer you a reasonably standard lifestyle say 25-30 years down the line)

2. I do not think any such survey exists as such, but from any source that you might've come across, what's the average amount of MF investment made by people monthly in the age group of 25-30 years?

I'm 24 rn and in a PSB for about an year now and have invested inconsistently, though now want to fix my contribution. I'm going for 20k/month and 10k in FD laddering as staff rate offers an extra percent on FDs. Also I'm actively trying to increase my income through switching/ promotion so I want to know if it's a good amount of investment as of now to make?

No debt.

Risk appetite - anything that works for 20-30 years horizon. Ig high it'd be.

Goal - general worthiness, commonly accepted luxuries (including traveling abroad say once an year or two)

Horizon - 20 years atleast

Allocation - SBI midcap index, SBI nifty index. I want to add a non-sbi small cap, pls suggest. I've about a lakh invested in gold fund and silver fof and won't put more in them.

App used- Investap, MF central. Employer restricts groww etc

Why these funds? - self analysis.