Multi Static Route + Internal Gateway with Hotspot

Hi i have a question on Routing Mark..
my current configuration is the following:

but i think the routing mark can help me to remove to device and have something like this:

Can anyone help me to configure only the Routing mark / mangle / nat for this net?

No reply?
/ip firewall mangle
add action=mark-routing chain=prerouting new-routing-mark=WAN1_W src-address=10.0.0.1/29
add action=mark-routing chain=prerouting new-routing-mark=WAN2_W src-address=10.0.1.0/29

/ip route
add distance=100 gateway=172.20.250.73 routing-mark=WAN1_W
add distance=100 gateway=172.20.250.81 routing-mark=WAN2_W


/ip firewall nat
add action=src-nat chain=srcnat comment=WAN1 src-address=10.0.0.0/29 to-addresses=83.xx.xx.128
add action=src-nat chain=srcnat comment=WAN2 src-address=10.0.1.0/29 to-addresses=65.xx.xx.21

Hello!
Double NAT is very bad. I think that you need to change design of your network.

But this is some rules in /ip firewall mangle

add action=mark-connection chain=prerouting new-connection-mark=WAN1_W-con src-address=10.0.0.1/29
add action=mark-connection chain=prerouting new-connection-mark=WAN1_W-con connection-mark=no-mark in-interface=ether1
add action=mark-routing chain=prerouting new-routing-mark=WAN1_W connection-mark=WAN1_W-con

add action=mark-connection chain=prerouting new-connection-mark=WAN2_W-con src-address=10.0.1.1/29
add action=mark-connection chain=prerouting new-connection-mark=WAN2_W-con connection-mark=no-mark in-interface=ether3
add action=mark-routing chain=prerouting new-routing-mark=WAN2_W connection-mark=WAN2_W-con

Hi devi1, thanks for the reply
I could to try your configuration, but how can i manage the public ip addresses? without this the internet is not reachable..

What are 172.20.250.73/29 and 172.20.250.81/29?

@devi1 is a Point to Point Layer 2 services.
I need to srcnat to the public ip address.