i would spend 50-50 i.e. 50% on splurge and 50% on investments. On splurging fancy dinner, cleaning services are ok but taking new car is not ok as it increases

i would spend 50-50 i.e. 50% on splurge and 50% on investments. On splurging fancy dinner, cleaning services are ok but taking new car is not ok as it increases the budget year over year so go for one time things like vacation etc. but avoid permanent lifestyle upgrade with the uncertain windfall.