as for the confusing timeline here is what i felt had happend:
ram’s dad died 10-15 years ago
meaning ram was 23-28 and priya was 17-22
and i remember in one epi they were showing younger priya who had her hair styled up a little and sara with glasses talking with mahendra, i think that was around the timeline ram’s dad got murdered
as for ram and vedu
ram proposed vedu when they were in college maybe vedu was 18 and ram was 21-22, and vedu probably thought to wait for ram to get his dad’s business but then the dad died. she sticked to him maybe thinking the business will still be same(dont forget she spend 2.5 lakh over a saree even when her husband went bankrupt and she knew it) , and seeing ram cant afford much she ditched him and later she see shashi is the rich one now whichimpressed her , she went to marry shashi. i guess it will be around 6-8 yesrs since she and shashi got married and maybe bri and adi got married 4-5 years ago.