Trying Not to Give Up - Call off engagement

My fiance's mother died last week. Our elopment was scheduled for June 27th - just he and I. This was a change from our original date on October 10th. All of these changes were due to COVID. If you've read my previous posts, nothing about my engagement has been easy. We're long distance because we met long distance - Midwest and the South. COVID happened and we've were seperated for 3 months. He haf his job transfer him here for the summer and as soon as he arrives, his mom dies 4 days later. He flew back to the south immediately.

Well, we were looking to purchase homes; in fact working with a local realtor while he was here. Yesterday, he went and placed an offer on a home in the south that has 2 master bedrooms ... Why? His sister no longer wants to live in the house their mother died in. I believe he bought this house to move his sister in bc he said she'd like to move temporarily to get away (sister, husband and baby). We agreed he'd purchase the house in just his name in advance for asset reasons (pre-nup to seperate my inherited assets from parents and not acquire the mortgage debt ... Long story) but we were a TEAM in this. Him buying a house on his own without consulting me is shocking! The fact he bought a home while his mother hasnt even been buried yet is baffling!! He knew I didn't care to move to this state and he jumped and did it. The house is so HUGE it looks like an office building ... Not a HOME! His wording is "trust me, you'll love the house, even your brother can move down and stay for a while, one big family". Fyi, his family is of Caribbean culture ... Mine two on my dad's side. Living as one big happy family is normal ....
Second, I asked him in frustration when are we getting married. He's made all yhese plans for a home and our elopement is on the back burner. He said "let me bury my mother first". This is baffling considering he bought a whole house out of state during the DAYS following his mom's death. All he said was "we're going to get married, I just need to bury my mom first". He's taking his mom back to their home country. That could be another 3 months maybe?!! I'm hurt and ANGRY! At this point I don't care about anything else but my wedding that has been postponed due to everything else. I'm ready to throw in the towell, be done and call of this engagement. We were totally in love but he's shown me his family comes first! I'm over it and trying so hard not to snap!