I suggest you that as the players of RPG2 will lose every business and house, same should be done with RPG1 players too.
After that we can participate in /bid for every business, house. Otherwise, RPG1 players will have an advantage eventually if they don't lose their businesses and houses.
This will help in balancing the economy of both the servers after fusion.
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Players owing level 999 houses, they should be given the same amount gold of for the amount they spent initially.
Eg. X bought a house for 10 euros, he should be given 2000 gold at the time of fusion.